Inclusion Criteria | Reasoning |
---|---|
- Minimum age of 18Â years | To ensure a minimal age of participation |
- At least once a week cannabis use over the 30Â days prior to study entry | To include occasional users to provide extended study validity |
- Current serious psychiatric disease or history of psychosis, schizophrenia, bipolar type I disorder or significant current suicidal or homicidal thoughts | To avoid exacerbation of serious symptoms of these severe psychiatric diseases |
- Other pharmacological or psycho-social treatments for cannabis use disorders | To avoid confounding treatment effects |
- Inability to read or write in German | To avoid confounding drug effects |
- For women: pregnancy and breastfeeding | To prevent subjects with these conditions from entering the study |